| Value | Category |
|---|---|
| 11 | Land owner |
| 12 | Farmer |
| 13 | Agricultural worker |
| 14 | Fisherman |
| 21 | Unskilled lab. 1 |
| 22 | Unskilled lab. 2 |
| 23 | Unskilled lab. 3 |
| 31 | Semi-skilled lab. |
| 41 | Professional worker |
| 51 | Big businessman |
| 52 | Small businessman |
| 61 | Unemployed |
| 62 | Retired |
| 96 | Other |
| 98 | Don't know |